Md Babul Hosen/iStock via Getty Images Applied Therapeutics, Inc. (NASDAQ:APLT) is a promising clinical-stage biotech that focuses on treating symptoms of galactosemia in the central nervous system [CNS]. Galactosemia is rare when the body lacks a particular enzyme that metabolizes galactose. As a result, galactose and galacticol accumulate, leading to aberrant neuronal activity due to toxic levels of aldose reductase [AR] in cells. This can cascade into potentially serious adverse effects if left untreated ...